Scenario C At DoubleTalk, Inc., Joe, a supervisor, pushes his employees' performance by constantly checking their work and threatening them if they fail to keep their deadlines. After months of mistreatment, the employees get together and sign a letter to the human resources department to express their grievances. What form of influence are the employees using?

a. Impression management
b. Silent authority
c. Referent
d. Assetiveness
e. Persuasion